When solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
If c = 7 and x = -7, what is the value of -7c(c - x)?
| -686 | |
| -560 | |
| 21 | |
| -90 |